The patterns for this Butterick B6448 Copyright McCALL’S® Company, NY are:

TOP (WOMEN'S): Loose-fitting top with button closure and back strap, neckline and sleeve variations. C, D: Front pleats.
You can use materials such as:
FABRICS: Double Georgette, Crepe de Chine, Etamine, Charmeuse, Cotton, Voile. Large diagonals are not suitable. *With Sens. **Without Sens.

Size guides can be found in "affiliations"